Skip site navigation (1)Skip section navigation (2)

FreeBSD Man Pages

Man Page or Keyword Search:
Man Architecture
Apropos Keyword Search (all sections) Output format
home | help
SR(4)		     FreeBSD/i386 Kernel Interfaces Manual		 SR(4)

NAME
     sr	-- synchronous RISCom/N2 / WANic 400/405 device	driver

SYNOPSIS
     device sr0	at isa?	port 0x300 irq 10 iomem	0xd0000
     device sr1	at isa?	port 0x310 irq 11 flags	0x1 iomem 0xd0000

     pseudo-device sppp

DESCRIPTION
     The sr driver supports the	RISCom/N2 ISA cards and	the WANic 400/405 PCI
     cards that	is based on the	HD64570	chip.

     The standard FreeBSD sppp code is used for	the link level layer.  The
     default protocol used is PPP.  The	Cisco HDLC protocol can	be used	by
     adding link2 to ifconfig(8).

     Alternately, the driver can be compiled to	support	netgraph(4) (see
     below).

     The flags field is	optional.  If it isn't specified, the driver will
     assume the	following:

	   The card has	2 ports.

	   The clock for the serial ports is external and the transmitter uses
		   the same clock as the receiver.

     The flags are a bit field and can be used to force	a different behaviour
     than the default.

	   0x01	   The card has	only one port.

	   0x10	   Use separate	external clocks	for transmit and receive on
		   port	0.

	   0x40	   Use separate	external clocks	for transmit and receive on
		   port	1.

NUMBERING
     Only one line for each card is needed in the kernel configuration file.
     The first card's ports will be installed from sr0.	The numbering of the
     next card will continue where the first stopped, eg. if the first card is
     a two port	card it	will use sr0 and sr1. The next card will then start at
     sr2.

     The card only supports IRQ	3, 4, 5, 7, 10,	11, 12 and 15.

     The iomem area is a 16Kb block and	must start at a	16Kb boundary.

NETGRAPH SUPPORT
     If	the kernel is compiled with options NETGRAPH then the sppp and Cisco
     HDLC modes	are disabled (and the sppp driver is unneeded),	and this
     driver functions as a netgraph(4) node with a single hook named rawdata.
     Connecting	to this	hook enables the transmission of raw HDLC frames.  The
     node will have the	same name as the device	with ``sync_'' prepended,
     e.g., sync_sr0.

DIAGNOSTICS
     sr%d: Warning illegal interrupt %d.  The card cannot use the specified
     interrupt.	 Choose	a different one.

FILES
     /sys/i386/isa/ic/hd64570.h
     /sys/i386/isa/if_srregs.h
     /sys/i386/isa/if_sr.c
     /sys/i386/isa/if_sr.h
     /sys/pci/if_sr_p.c

BUGS
     At	the moment only	the X.21 interface is tested.  The others may need
     tweaks to the clock selection code.

     The code can probably stand some optimizing.

SEE ALSO
     ar(4), cx(4), netgraph(4),	netintro(4), ifconfig(8)

AUTHORS
     The sr device driver was written by John Hay <jhay@FreeBSD.org>.

     Netgraph support was added	by Julian Elischer <julian@FreeBSD.org>.

FreeBSD	9.3			 July 4, 1996			   FreeBSD 9.3

NAME | SYNOPSIS | DESCRIPTION | NUMBERING | NETGRAPH SUPPORT | DIAGNOSTICS | FILES | BUGS | SEE ALSO | AUTHORS

Want to link to this manual page? Use this URL:
<http://www.freebsd.org/cgi/man.cgi?query=sr&sektion=4&manpath=FreeBSD+4.5-RELEASE>

home | help